Interim Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
Jun. 30, 2017	Jul. 01, 2016
Operating activities:
Net income including controlling interest	$ 180,487	$ 162,323
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	64,543	63,829
Stock-based compensation	48,940	51,473
Amortization of premium on investments	2,077	3,288
Excess tax benefit from exercise of stock options	(4,881)	(1,313)
Provision for doubtful accounts	1,167	1,133
Deferred income taxes	(11,446)	(5,838)
Other non-cash items affecting net income	2,547	306
Changes in operating assets and liabilities:
Accounts receivable	(7,576)	8,798
Inventories	(6,840)	(6,024)
Prepaid expenses and other assets	(10,657)	(11,075)
Accounts payable and other liabilities	14,877	10,808
Income taxes, net	19,033	(1,612)
Deferred revenue	(560)	8,052
Other non-current liabilities	773	(193)
Net cash provided by operating activities	292,484	283,955
Investing activities:
Purchase of investments	(204,447)	(247,680)
Proceeds from sales of investment securities	36,579	242,141
Proceeds from maturities of investment securities	126,199	77,668
Purchases of property, plant and equipment	(81,668)	(77,079)
Purchases of intangible assets	(5,250)	(118,770)
Change in restricted cash	(2,542)	(2,737)
Net cash provided by/(used in) investing activities	(131,129)	(126,457)
Financing activities:
Proceeds from issuance of common stock	47,765	44,067
Repurchase of common stock	(74,994)	(84,854)
Payment of cash dividend	(42,768)	(36,256)
Distribution to controlling interest	(2,094)	(214)
Excess tax benefit from the exercise of stock options	4,881	1,313
Shares repurchased for tax withholdings on vesting of restricted stock	(16,875)	(12,153)
Net cash used in financing activities	(84,085)	(88,097)
Effect of foreign exchange rate changes on cash and cash equivalents	(766)	(1,336)
Net increase/(decrease) in cash and cash equivalents	76,504	68,065
Cash and cash equivalents at beginning of period	516,112	531,926
Cash and cash equivalents at end of period	592,616	599,991
Supplemental disclosure:
Cash paid for income taxes, net of refunds received	44,694	50,235
Decrease in PP&E purchases unpaid at period-end	(11,614)	(13,911)
Noncash or Part Noncash Acquisition, Consideration Payable	$ 0	$ 95

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